1999 C5 Erratic idle and stall
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1999 C5 Erratic idle and stall Hello, I have a 1999 FRC 6 speed with 70k on it. I have the Vararam intake, longtube headers, x pipe, b&b bullet mufflers, no cats and a mail order tune. Recently, I have been experiencing some weird behavior. The car will idle high at about 1,500 or 2,000 rpms for awhile then it will dip back down to normal and then sometimes shut completely off. I am guilty of replacing a few things with out due diligence, thinking that I knew what the problem was. I have replaced the fuel pump with a walbro, and the fuel filter/regulator. I replaced the throttle postion sensor. I still get the same behavior. When i replaced the fuel pump I was a dummy and pulled a wire off of the fuel level sensor. I soldiered it thinking that I could fix it but it did not do the trick so my fuel gauge is currently not working. I used my multi meter to check the injectors and they all read about the same at 14 ohms of resistance. I changed all the plugs and they all look normal and about the same, nothing out of the ordinary. I completely took apart my vararam intake and mass airflow sensor assembly. Cleaned the air filter, cleaned the mass air flow sensor and re-assembled everything so that is all sealed up. I am at a loss. I do not know what to check next. I am not getting any codes except for the fuel level sensor P0463. Any help is appreciated.
Intake Manifold gaskets and pcv tubing. Do not just look at the pcv tubing, take it all off and inspect it, preventative maintenance on it only helps. You could buy or make a smoke machine to test the intake, or spray carb cleaner in a few well aimed spots around the gaskets and see if anything happens.
